Replace routes.py

blog/routes.py

@@ -24,7 +24,7 @@ def cv():
 
 @app.route('/download')
 def download():
-  return send_file('static\pdf\cv.pdf', as_attachment=True)
+  return send_file('static/pdf/cv.pdf', as_attachment=True)
 
 @app.route("/blog")
 def blog():